资源简介
自己写的非常好用的C语言线程,纯C代码,可以随便用。
代码片段和文件信息
#include
#include
#include
#include
#include
#include
#include
#include “threadPool.h“
#ifdef __cplusplus
#if __cplusplus
extern “C“ {
#endif
#endif /* End of #ifdef __cplusplus */
static CThread_pool *pool = NULL;
void pool_init (int max_thread_num)
{
pool = (CThread_pool *)malloc(sizeof(CThread_pool));
pthread_mutex_init(&(pool->queue_lock) NULL);
pthread_cond_init(&(pool->queue_ready) NULL);
pool->queue_head = NULL;
pool->max_thread_num = max_thread_num;
pool->cur_queue_size = 0;
pool->shutdown = 0;
pool->threadid = (pthread_t *)malloc(max_thread_num * sizeof(pthread_t));
int i = 0;
for (i=0; i {
pthread_create(&(pool->threadid[i]) NULL thread_routine NULL);
}
}
/*向线程池中加入任务*/
int pool_add_worker (void *(*process)(void *arg) void *arg)
{
/*构造一个新任务*/
CThread_worker *newworker = (CThread_worker*)malloc(sizeof(CThread_worker));
newworker->process = process;
newworker->arg = arg;
newworker->next = NULL; /*别忘置空*/
pthread_mutex_lock (&(pool->queue_lock));
/*将任务加入到等待队列中*/
CThread_worker *member = pool->queue_head;
if (member != NULL)
{
while (member->next != NULL) member = member->next;
member->next = newworker;
}
else
{
pool->queue_head = newworker;
}
assert(pool->queue_head != NULL);
pool->cur_queue_size++;
pthread_mutex_unlock(&(pool->queue_lock));
/*好了,等待队列中有任务了,唤醒一个等待线程*/
pthread_cond_signal(&(pool->queue_ready));
return 0;
}
/*销毁线程池,等待队列中的任务不会再被执行,但是正在运行的线程会一直
把任务运行完后再退出*/
int pool_destroy ()
{
if (pool->shutdown)
return -1;/*防止两次调用*/
pool->shutdown = 1;
/*唤醒所有等待线程,线程池要销毁了*/
pthread_cond_broadcast(&(pool->queue_ready));
/*阻塞等待线程退出,否则就成僵尸了*/
int i;
for (i=0; imax_thread_num; i++)
pthread_join(pool->threadid[i] NULL);
free(pool->threadid) pool->threadid = NULL;
/*销毁等待队列*/
CThread_worker *head = NULL;
while (pool->queue_head != NULL)
{
head = pool->queue_head;
pool->queue_head = pool->queue_head->next;
free(head);
}
/*条件变量和互斥量也别忘了销毁*/
pthread_mutex_destroy(&(pool->queue_lock));
pthread_cond_destroy(&(pool->queue_ready));
free(pool) pool=NULL;
return 0;
}
void* thread_routine (void *arg)
{
for (;;)
{
pthread_mutex_lock (&(pool->queue_lock));
/*如果等待队列为0并且不销毁线程池,则处于阻塞状态; 注意
pthread_cond_wait是一个原子操作,等待前会解锁,唤醒后会加锁*/
while (pool->cur_queue_size == 0 && !pool->shutdown)
{
//printf(“thread 0x%x is waiting\n“ pthread_self ());
pthread_cond_wait(&(pool->queue_ready) &(pool->queue_lock));
}
/*线程池要销毁了*/
if (pool->shutdown)
{
/*遇到breakcontinuereturn等跳转语句,千万不要忘记先解锁*/
pthread_mutex_unlock(&(pool->queue_lock));
printf(“thr
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2015-12-03 17:27 c语言线程池\
文件 3987 2015-12-03 17:27 c语言线程池\threadPool.c
文件 1124 2015-10-22 17:04 c语言线程池\threadPool.h
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